Spring-roller.



E. H. MoCLOUD.

SPRING ROLLER.

APPLIOATION FILED 1120.15, 1911.

Patented Sept. 30, 1913.

5140014 to; Edward 15011 6701442 All; 61110111411135 UNITED STATES PATENT OFFICE.

EDWARD H. MCCLOUD, OF COLUMBUS, OHIO, ASSIGNOR TO THE KINNEAR MANUFAC- TURING COMPANY, OF COLUMBUS, OHIO, A CORPORATION OF WEST VIRGINIA.

SPRING-ROLLER.

Specification of Letters Patent.

Patented Sept; 30, 1913.

Application filed December 15, 1911. Serial No. 665,886.

To all whom it may concern:

Be it known that I, EDWARD H.-MoCLoUo, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented a certain new and useful Improvement in Spring-Rollers, of which the following is a specification.

This invention relating more especially to springrollers for fire shutters has for its object to provide an improved construction of the sort of shutter roller illustrated in the United States patent to Allison M. MacFarland, dated March 26, 1912, No. 1,021,057.

The invention is embodied in the construction set forth in the following description and pointed out in the claims appended hereto."

In the accompanying drawings forming part of this disclosureFigure 1 'is a central vertical section taken longitudinally through the roller, Fig. 2 is an end view of the device for holding from rotation normally one portion of the roller shaft, the same being in shaft-holding position, Fig. 3 is a similar view of the parts shown in Fig. 2, in released position, a part being broken out. p

In the views the character 15 designates the barrel to receive the rolling shutter, a fraction of which is shown at 15, said barrel having fitted and secured in its opposite ends perforated plugs or heads16 and 16 The barrel is carried upon a two-part shaft, the parts being designated 17 and 17* respectively, which in turn are supported in end brackets 18 and 18 The shaft part 17 has pinned on its end beyond the bracket a spur wheel 19 that is engaged by a dog 19 on an arm 20, which arm is held up to perform this function by a wire 21 containing one or more connections 22 fusible by a dangerous rise of temperature. The wire 21 is preferably extended to the short arm of a weighted lever 23.

The character 24 designates a weighted rod attached to a hinged arm 25 that supports the arm 20 so as to hold the dog engaged with the spur wheel 19. The weightedn'od 24 insures the release of the arms 25 and 20 when one of the fusible connections is melted.

The shaft part 17 has pinned to its inner secured to the barrel. The tension member or spring 27 is secured so that the unrolling of the shutter increases its tension and said spring is preferably of dimensions or power to counterbalance the shutter for normal operation, that is to say, for winding and unwinding manually in normal conditions. The inner end of the shaft part 17 fits into the collar 26 and said collar can turn on that shaft part when the shaft part 17 is liberated. Said shaft part 17 has pinned to it a collar 29 to which and the collar 26 are secured the opposite ends of a coil spring 30 constituting a supplementary tension member encircling the shaft part 17 In normal operation, as by hand, the spring 27 only is effective on the roller and curtain but when the shaft part 17 is released (as by the melting of a connection 22) the collar 26 is also released thereby adding, through said collar 26, the spring 30 to the spring 27, thus lessening the resistance to the weight of the curtain sufficiently to permit the latter to descend by gravity. It is desirable that the strength of the spring 30 be such that when added to the spring 27 the two shall be ample to prevent a violent descent of the curtain and leave enough tension when the shutter is closed to permit the latter to be raised by hand. The tension, which the springs shall exert when the shutter is released, can be regulated to great nicety and according to the length and weight of the shutter by preliminarily winding and setting the spring 30. For this purpose the shaft part 17 has fixed to its outer end beyond the bracket 18 a wheel 31 having one or more projections which can be engaged by a keeper 32 in the bracket to prevent said wheel and shaft from turning after the tension to secure the desired result has been placed upon the spring 30.

Some changes in the form and arrange: ment of the parts can be made without departing from the gist of the invention.

What I claim is:

1. In a rolling shutter, the combination with a rotary shutter-receiving member, a two part shaft for supporting the same, means for fixing one of said shaft parts, thermally controlled means for holding the other shaft part, a normally operable tension member connected with the releasable shaft part and the shutter receiving memher, a normally inoperable tension device fixed at one end and connected with the releasable shaft part at the other, substantially as described.

2. In a rolling shutter, the combination with a rotary shutter receiving member, a two part shaft for supporting the same, adjustable means for fixing one of said shaft parts, thermally controlled means for holding the other shaft part, a normally operable tension member connected with the releasable shaft part and the shutter receiving member, and a normally inoperable tension device fixed at one end and connected with the releasable shaft part at the other.

3. In a rolling shutter, the combination with a rotary shutter receiving member, a two part shaft for supporting the same, means for fixing one of said shaft parts, thermally controlled means for holding the other shaft part, a collar fixed on the innerend of the releasable shaft part adapted to turn on the inner end of the fixed shaft part, a normally operable tension member connected with the collar and with the shutter receiving member, and a normally inoperable tension member connected with the collar and a fixed point. I

4. In a rollin shutter, the combination with a rotary s utter-receiving member, a two part shaft for supporting the same,

means for adjusting and fixing one of said shaft parts, thermally controlled means for holding the other shaft part, a collar fixed on the inner end of the releasable shaft part adapted to turn on the inner end of the fixed shaft part, a normally operable tension member connected with the collar and with the shutter receiving member, and a normally inoperable tension member connected with said collar and with the adjustable shaft part, substantially as described.

5. In a rolling shutter, the combination with a rotary shutter-receiving member, means at the opposite ends thereof for supporting the same, a tension member normally operative on the shutter-receiving means, a normally inoperative supplementary tension member, normally stationary means for connecting the two tension members, means for adJusting and fixing the supplementary tension .member, and thermally controlled means for releasing the means connecting the two tension members, substantially as described. a v

EDWARD H. MoGLOUD.

Witnesses:

ANNA TERESA KING, CHAS. BRASHEAR. 

